When I rebuilt my 142, I installed a new, original style heater control valve with the thermostatic regulating element. The valve does not operate very smoothly and it doesn't completely shut off the flow of hot water despite assiduous attention to cable adjustment and lubrication. The difficulty in getting it to close is quite noticeable and unappreciated in the summer. I would like to get something that works a little smoother and actually shuts off the flow of hot water.

I seem to recall that my 1979 242GT had a simple cable operated heater valve and I know that my 1987 745T had a cable operated valve (although all I have been able to find listed are vacuum controlled valves for the 740). Has anybody retrofitted a simple (and effective) mechanical heater valve to their 140 and if so, what did you use?

Thanks - guy with a hot right foot.